Gets the max-history of a ref, or sets it and returns the ref
When set to logical false, strings and characters will be printed with non-alphanumeric characters converted to the appropriate escape sequences. Defaults to true
Evaluates body with *read-eval* set to a "known" value, i.e. substituting true for :unknown if necessary.
Do not call this directly, use 'spec' with a regex op argument
Recursively transforms form by replacing keys in smap with their values. Like clojure/replace but works on any data structure. Does replacement at the root of the tree first.